Director of “Invisible Hands,” Shraysi Tandonon, documents child slavery on cacao plantations in Ghana, accessory factories in India, and tobacco farms in the United States. She says that major firms practiced “willful ignorance” because they see it as too much cost and effort to tackle the problem. Tandon said the average age of child labourers she spoke to while making the film was 12, but the youngest was a girl of four or five working on a tobacco plant in Indonesia.The effects on child labourers were often lifelong, she said, as they were exposed to dangerous chemical and heavy machinery. Tandon added that child laborers were also extremely vulnerable to sexual abuse by the adults who control them.When asked what the solution could be, Tandon noted that companies need to map and audit their suppliers, while consumers need to actively research if products they buy could be made using slave labor.“Companies take action when their brand or reputation is being threatened,” she said.